A 49-year-old San Francisco man faces human trafficking charges after prosecutors said he pimped a 17-year-old girl out of a San Bruno home and threatened her with a gun if she didn’t follow his rules.

Defendant David Blackwell allowed the teen to leave the condominium where she lived to see her friends, but she had to ask his permission, District Attorney Steve Wagstaffe said Wednesday. Blackwell is accused of brandishing a gun at her for having friends over, in violation of rules he set for the girl.

Blackwell used an Internet posting to offer the girl for paid sex, Wagstaffe said. She also had to be available at a moment’s notice to service clients, he said.

Blackwell made his first appearance on the case Tuesday in San Mateo County Superior Court. He didn’t enter a plea to charges of trafficking, pimping, pandering, kidnapping and assault with a firearm, Wagstaffe said.

Blackwell is due back in court April 27 and is being held is lieu of $1 million bail.

Three women have told the New York Times that music mogul Russell Simmons raped them, the latest in a cascade of serious allegations of sexual misconduct against powerful men in entertainment, media, politics and elsewhere.